F0/100

Grafton Tap Water Quality: Is It Safe to Drink? (2026 Report)

Serving 10,925 residents · Massachusetts

What's In Grafton's Tap Water?

Water Utility

Contaminants Tested

Exceed EPA Limits

Above EPA Goals

6 contaminants above EPA health goals

Contaminant	Detected	Limit (MCL)	Goal (MCLG)	Status
Copper (90th percentile)	1.63 mg/L	1.30 mg/L	1.30 mg/L	Over Limit
PFOA	0.006 µg/L	0.004 µg/L	0 µg/L	Over Limit
PFOS	0.006 µg/L	0.004 µg/L	0 µg/L	Over Limit
manganese	1140.00 µg/L	—	300.00 µg/L	Above Goal
1,4-dioxane	0.530 µg/L	—	0.350 µg/L	Above Goal
Lead (90th percentile)	0.008 mg/L	0.015 mg/L	0 mg/L	Above Goal

EPA Violation History

Violations (last 5yr)

Unresolved

Health-Related

TIER 3Resolved

Violation related to Consumer Confidence Report

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: July 22, 2023 – September 9, 2023Rule: Consumer Confidence RuleEnforcement: Resolving — corrective action underway

TIER 3Resolved

Violation related to Consumer Confidence Report

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 3, 2023 – April 5, 2023Rule: Consumer Confidence RuleEnforcement: Resolving — corrective action underway

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Enforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Resolved

Disinfection byproduct treatment technique failure

When: April 1, 2023 – September 8, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Enforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Enforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2023 – June 30, 2023Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

Understanding violation severity

Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.

Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly

Water Utility Details

GRAFTON WATER DISTRICT

Population Served

10,925

Water Source

Groundwater

System ID

MA2110000

Frequently Asked Questions About Grafton Water

Is Grafton tap water safe to drink?

Grafton, Massachusetts tap water receives a grade of F (0/100), which is considered failing. 3 contaminant(s) exceed EPA maximum contaminant levels and 43 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.

What contaminants are in Grafton's water?

Of the 67 contaminants tested in Grafton's water supply, the most notable include PFOA, PFOS, Copper (90th percentile), Lead (90th percentile), manganese. 3 contaminant(s) exceed EPA legal limits (MCLs). 6 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.

Does Grafton have any water quality violations?

Yes, Grafton has 43 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, Other, MCL. 7 of these are health-based violations, which are the most serious category.

Do I need a water filter in Grafton?

Based on EPA data, using a water filter in Grafton is recommended. 3 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.

Where does Grafton's tap water come from?

Grafton's drinking water is sourced from groundwater and supplied by GRAFTON WATER DISTRICT. The system serves approximately 10,925 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.

How often is Grafton's water tested?

Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Grafton's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.

How does Grafton's water compare to other cities in Massachusetts?

Grafton's water quality score of 0/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our Massachusetts state page to see how all cities in the state compare.

What should I do if I'm concerned about Grafton's water quality?

If you have concerns about Grafton's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (GRAFTON WATER DISTRICT) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.

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